Speed-indicator.



Nb.s2z2 1. T PATENTED JULY31,1906.

R B.NORTHu SPEED INDICATOR.

APPLIGATIONIILED 13150.13, 190}.

' 2 SHEETS-SHEBT1.

Milli! PATENTED JULY 31, 1906.

R,.B. NORTH. SPEED INDICATOR. APPLICATION FILED DEC.13,1904- 2SHEETS-SHEET 2 a a a J a d win L to letters and figures of referencemarked number of revolutions per minute, the said inr ity of difierentstrengths,

' of Fig. 2.

" speed indicator.

'provide an improved indicator for showing UNITED STATES PATENT OFFICE,

ROBERT Benson Noam, or sono, ENGLAND.

w SPEED-INDICATOR.

Specification 6f Letters Patent. I Application filed December 13, 1904.Serial No. 236,688

No. 827,261. Patented July 31, 1996.

has for its principal object to provide an indicator suitable for amotor-car or the 11k To all whom it may concern: I

Be it known that 1, ROBERT BENSON NORTH, a subject'of theKing ofGreatBritain, residing at No. 1.4 Soho S uare, Soho, in the county ofMiddlesex, Eng and, have invented certain new and useful Improvements inSpeed-Indicators; and I do hereby declare the following to be a full,clear, and exact description where the speed is very variable and whereit is desirable to indicate accurately both at a slow speed of a fewmiles and at a uick speed of, say, twenty to forty milesan our or more.A spindle a is provided, which is mounted in a bearing in the casing orframe k, rotated through a coupling 1) lay-flexible shafting or othersuitable transmission-gear vgine or machine the speed of which is to beindicated, or the flexible provided with a friction-wheel adapted to runon the nave or other part of a wheel or on the work to be turned-in thecase of a lathe, for example. This spindle, a has a toothed V of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and

thereon, which form a part of this specification.

These improvements have for object to the speed of motors or otherrotating machinwheel a mounted thereon, which gears with a cry or ofvehicles propelled by motors in orpinion d, mounted on a spindle 0, alsomountder to show on a dial or sea e the speed in ed in bearings in thecasing. Upon this spindle e is mounted a centrifugal governor, having,for instance,

ed by links 31 to the overnor-head g and by links-32 to a movab e sleeveh. The gov ernor-head g is fixed to one end of the spindle e, and themovable sleeve his provided with a circular rack 'i, which gears orcomes into gear with a pinion l on a spindle m, which, in theconstruction shown, is the spindle upon which the hand or pointer 30 ismounted, or intermediate gearing may be provided. In order to bring thepointer back to zero, spindle mhas a spring'n, the other end of which isfixed to the post'p, and a stop 0, which comes into contact with'thesaid post when zero is reached. To; counteract the centrifugal force,helical spring, a sleeve, and a collar are ovidedon the governorspindle,against which collar the spring is compresse when the centrifugal forcebegins to act; whereby the rack comes into gear with the pinion andturns it, the amount oi movement being indicated on the dial by the handon the pinion-spindle. This: arrangement suffices for a slow or not veryvariable speed; butfor a higher or more variable or reatlyvariable s eedone or more additiona helical dicator being of the type in which agovernor device is employed, so as to compress apluralone after theother. Or as regards a motor-car or other vehicle the speed inmiles runper hour may be indicated with or without means for also showing thenumber of revolutions of the motor, and a cyclometer for indicating thenumber of miles run may also be combined therewith. It is also evidentthat the invention may be employed for indicatin the speed of cutting inlathes and other mac cry. I

In order that the invention may be more easily understood, the same isillustrated with reference to the accompanying drawinvs, of whichigure 1is an elevation=of an apparatus suitable for application to a motor-caror other vehicle with means for indicating the speed of the vehicle inmiles per hour, the total number of miles and fractions of miles run,and the total number of miles run on the trip. Fig. 2 is a rearelevation, partly in section, with the back or cover removed. Fig. 3 isa left-hand vertical section on the line 3 3 Fig. 4 is a verticalsection on the line 4 4 of Fig. 2. Fig. 5 is an elevation of thecyclometer-gear; and Figs. 6 and 7 are perspective views of two of t ewheels used in same; but the cyclometer-gear in itself forms no art ofthis invention and is only illustrate .and described for the purpose ofshowing how such gear may be applied to the spring M has been so farcompressed. as may it mayll er e be stated that the invention shaftingmay be weights or balls f, connect springs o stepwise-increased strengthare from the enthe a be fairly in accordance with its strength, and whenthe second and stronger spring 1' has been similarly compressed to itsfair limit the third and. still stronger spring g comes into action.These two additional springs are by preference arranged around the gov-i'i1or-- spindle, as shown, one of them, the spring g, acting againstthe sleeve or collar 7t, loose on the spindle e, and the other spring uacting against the governonheed With. the apparatus so far described mayhe combined any suitable construction of countcr-cyclornete; or train ofwheels wi h indicating device for showing the number of revolutions madeor miles run. A. suitable arrangement is shown, and it consists inproiding the spindle a with a worm 1;, which gears with. a WOIDr-WllGOlw, on the spindle of which there is another worm n3, Fi 3, which drivesit toothed wheel 3/, mounted on a spindies. The said wheel. y gears witha toothed wheel 1, mounted on spindle 2. This spindle 2 (best seen invFig. 5) carries a numbered drum 5 for showing tenths of a mile throu h aslot in the dial ,6, Fig. 1. The said spindle 2 also carries two wheelsmarked 7 and 8, Fig. 5, having one tooth. each and of which one is shownto an enlarged scale in 7. As seen in Fig. 5, the Wheel '7 gears onceduring each revolution with a wheel 9, mounted on. a spindle 10, whichcarries the drum 11 for showing units of miles. The wheel 9 has twentyteeth, and every other one of these partly cut away, as shown in Fig. 6.The Wheel 7 has two teeth and a Flange of the same depth as teeth. Whenneither of the teeth is in gear with the teeth on the wheel 9, theflange is 'n'actically in contact with the outer edges of two entireteeth on the wheel 9 a partly--cut-away tooth in the latter permittingthereof, and the result is the wheel. 9 is PIGVSHlLGd from revolving;but as soon the two teeth in the wheel 7 eni g'e with. wheel 9 thelatter is turn d. a

. s. ol' two teeth. on the flan e on the reel 7 again coi'nes intocontact with the outer edges ol' vro entire teeth holding the wheel. 9locl so on. The drum ll malt-es o a revolution for each rem olution o l7. The spindle l-fl has l wne. e tooth which 3' rlied :53, the A let toimlios. .7

he spindle of the drum E4: on a single-toothed spindle dle 20, carryinga drum to indicate thousands of miles. ln order to be able to indicatethe number of miles run during any desired period, such during a. day orat part of at day, another cyclonic-tor apparatus is 81(11- ployed whichmay he set to zero a /lune. do sired. Such an. arrangement consists, forinstance, of a toothed wl'iecl having a drum mounted on its sleeve,whicl'i sleeve is revoluhle on the spindle it). This drum shows units ofmiles. The s eeve oi the wheel 21 is :lrictionstight on ti xspindle .i Oand with l W single-toothed wheel 8 on the spindle 2. "l. hesleeve-carrying wheel 21 also has mount-- ed thereon the singletoothedwheel 22, which gears with the toothed whee, 23, loose on the spindle24;, the (lrui'n of wlx ch indicates tens of miles, so that these twodrums rosy easily. be set to zero when the spindle 25 is witl'idrawnagainst the action of the soring 26 until the w eel :12? on the saidspindle 25 gears witl wheel 28 made in one with the WheeLS, hich isrevoluble but frictiont ight on the spindle 2, and on turning the milledhead 29 the wheels which are on the three spindles 2, l0, and 2 ay herevolved until the two drums register zero.

What 1 claim as my invention, and desire to secure by Letters Patent, i.

1. .ln 2. speed-indicator, the combination with driven governorspindle(ll a governor secured at one end to the shaft, e slidin sleeve on thespindle, a rack on the sleeve and rotatable therewith, a plurality ofsprings of different strengths on the spindle adapted to he successivelycompressed by the sleeve when the governor moves outward by in-- 2. In aspeet indicator, with s driven governor-spine combination l on thespindle, eotii the w l l ing sleeve on said sl and head, e.

of s 1 of dill'erent strength surrounding I )ulG and bet et-n the sleeveand got no SIICSESSl'tKl" compressed by the novernei'it o1 Weights, rackon U c and e pointer directly operate-(l oy 1 t, arms connecting the toseid sleeve, a plurality

